Book Notes Exam 1 - • the population is the set of all...

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Statistics Notes: Exam 1 1.1 How Can You Investigate Using Data? The information we gather with experiments and with surveys is called data. statistics is the art and science of designing studies and analyzing the data that those studies produce. its ultimate goal is translating data into knowledge and understanding of the world around us. statistics is the art and science of learning from data. Three main aspects of statistics: o design- planning how to obtain data to answer the questions o description- summarizing the data that are obtained o inference- making decisions and predictions based on the data. 1.2 We Learn about populations using samples Subjects- entities that we measure in a study.
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Unformatted text preview: • the population is the set of all the subjects of interest. o we usually have data for some of them which we called our sample. • Population- all subjects of interest • Sample- subjects for whom we have data. • descriptive statistics refers to methods for summarizing the data. the summaries usually consist of graphs and numbers such as averages and percentages. • inferential statistics refers to methods of making decisions or predictions about a population based on data obtained form a sample of that population. • a parameter is a numerical summary of the population. • a statistic is a numerical summary of a sample taken from the population. •...
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This note was uploaded on 04/04/2012 for the course STA 2023 taught by Professor Ripol during the Spring '08 term at University of Florida.

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